Home › NEET UG › chemistry › c11kossellewisionic › Per NCERT §4.2.1, the LATTICE ENTHALPY of an ion…
Per NCERT §4.2.1, the LATTICE ENTHALPY of an ionic solid is defined as which quantity?
AEnergy required to completely separate one mole of solid ionic compound into gaseous constituent ions
BEnergy of ionisation of solid
CEnergy of melting
DBond energy of one ionic bond
Answer & Solution
Correct answer: A. Energy required to completely separate one mole of solid ionic compound into gaseous constituent ions
Per NCERT §4.2.1, lattice enthalpy = energy to dissociate 1 mol solid → gaseous ions (infinite separation). NaCl: 788 kJ mol⁻¹.
Related questions
Per NCERT §4.3.4 (bond order), which trio of N₂, CO, and NO⁺ have which property in commonPer NCERT §4.3.2, the H-O-H BOND ANGLE in water molecule is which value?Per NCERT §4.2, for NaCl formation: IE(Na) = +496 kJ/mol, ΔₑgH(Cl) = −349 kJ/mol — these aPer NCERT §4.2, IONIC bonds form most readily between elements with which combination of pPer NCERT §4.1.4, formal charges on the central O atom + terminal O atoms in OZONE (O₃) LePer NCERT §4.1.4, the FORMAL CHARGE on an atom in a Lewis structure is given by which formPer NCERT §4.1.5 (odd-electron molecules), which species violates the octet rule because oPer NCERT §4.1.5, which examples illustrate an EXPANDED octet (more than 8 e⁻ around centr